<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>TestForm</title>
</head>
<body>
    <form action="http://127.0.0.1:5000/data" method="POST">
        <input type="text" name="username">
        <input type="text" name="password">
        <input type="submit" value="submit">
    </form>

</body>
</html>